Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon.

Recent Observations: No unusual activity was noted at any of the Washington or Oregon Cascade volcanoes during the week. A flurry of small (magnitude 1 or less) earthquakes beneath the west flank of Newberry Volcano was caused by stimulation of the hot dry rock geothermal …